For so long I've been wanting a system I can ask - Why is this element "HERE" - instead of "THERE" where "HERE" might be 60 pixels to the left, or off the sc

For so long I've been wanting a system I can ask - Why is this element "HERE" - instead of "THERE" where "HERE" might be 60 pixels to the left, or off the screen + "THERE" is somewhere else. Basically a system that would be able to interegate the DOM, work out which rules might be causing the problem or have a go at some modifications. It could answer: "blah.css resets clear on line 266" - toggle